<!--
 DAPjs
 Copyright Arm Limited 2018

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:

 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
-->

<!DOCTYPE html>
<html>
<head>
    <title>DAPjs Demo</title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
    <link href="https://fonts.googleapis.com/css?family=Raleway:400,600" rel="stylesheet">
	<style>
        html { margin: 0; padding: 0; border: 0; }
        body { font-family: 'Raleway', sans-serif; color: #d7ecfb; background-color: #072b44; text-align: center; }
        h1 { font-weight: 400; }
        strong { font-weight: 600; }
        #drop { position: relative; margin: 20px auto; max-width: 500px; background-color: rgba(255, 255, 255, 0.10); padding: 100px 20px 80px 20px; outline: 2px dashed #072b44; outline-offset: -10px; }
        #drop.hover { outline-offset: -10px; background-color: rgba(255, 255, 255, 0.15); }
        #icon { width: 100%; fill: #d7ecfb; margin-bottom: 30px; }
        #github { fill: #d7ecfb; }
        #github:hover { fill: #8bb5ba; }
        #file { width: 0.1px; height: 0.1px; opacity: 0; z-index: -1; }
        #label { cursor: pointer; }
        #label:hover strong { color: #8bb5ba; }
        #select { position: absolute; left: 0; right: 0; visibility: hidden; }
        #button { font-size: 12px; color: inherit; margin: 20px auto; border: 0px; background-color: #1b679c; height: 30px; padding: 0 30px; border-radius: 4px; text-transform: uppercase; cursor: pointer; outline: none; }
        #button:hover { background: #2674ab; }
        #status { margin: 20px auto; border: 1px solid #d7ecfb; width: 70%; height: 24px; visibility: hidden; }
        #bar { background: #2674ab; width: 0%; height: 100%; }
        #transfer { width: 100%; line-height: 24px; margin-top: -24px; }
	</style>
</head>

<body>
    <h1>DAPjs WebUSB Flash</h1>
    <div id="drop">
		<svg id="icon" xmlns="http://www.w3.org/2000/svg" width="50" height="43" viewBox="0 0 50 43">
            <path d="M48.4 26.5c-.9 0-1.7.7-1.7 1.7v11.6h-43.3v-11.6c0-.9-.7-1.7-1.7-1.7s-1.7.7-1.7 1.7v13.2c0 .9.7 1.7 1.7 1.7h46.7c.9 0 1.7-.7 1.7-1.7v-13.2c0-1-.7-1.7-1.7-1.7zm-24.5 6.1c.3.3.8.5 1.2.5.4 0 .9-.2 1.2-.5l10-11.6c.7-.7.7-1.7 0-2.4s-1.7-.7-2.4 0l-7.1 8.3v-25.3c0-.9-.7-1.7-1.7-1.7s-1.7.7-1.7 1.7v25.3l-7.1-8.3c-.7-.7-1.7-.7-2.4 0s-.7 1.7 0 2.4l10 11.6z"/>
        </svg>

		<input id="file" type="file" />
		<label id="label" for="file">
            <strong>Choose a firmware image</strong>
            <span>or drag it here</span>
        </label>

        <div id="select">
            <button id="button">Select Device</button>
        </div>

        <div id="status">
            <div id="bar"></div>
            <div id="transfer"></div>
        </div>
    </div>

    <a href="https://github.com/ARMmbed/dapjs/">
        <svg id="github" xmlns="http://www.w3.org/2000/svg" width="40" height="40" viewBox="0 0 16 16">
            <path d="M8 0C3.58 0 0 3.58 0 8c0 3.54 2.29 6.53 5.47 7.59.4.07.55-.17.55-.38 0-.19-.01-.82-.01-1.49-2.01.37-2.53-.49-2.69-.94-.09-.23-.48-.94-.82-1.13-.28-.15-.68-.52-.01-.53.63-.01 1.08.58 1.23.82.72 1.21 1.87.87 2.33.66.07-.52.28-.87.51-1.07-1.78-.2-3.64-.89-3.64-3.95 0-.87.31-1.59.82-2.15-.08-.2-.36-1.02.08-2.12 0 0 .67-.21 2.2.82.64-.18 1.32-.27 2-.27.68 0 1.36.09 2 .27 1.53-1.04 2.2-.82 2.2-.82.44 1.1.16 1.92.08 2.12.51.56.82 1.27.82 2.15 0 3.07-1.87 3.75-3.65 3.95.29.25.54.73.54 1.48 0 1.07-.01 1.93-.01 2.2 0 .21.15.46.55.38A8.013 8.013 0 0 0 16 8c0-4.42-3.58-8-8-8z"/>
        </svg>
    </a>

    <script type="text/javascript" src="../../dist/dap.umd.js"></script>

    <script>
        let dropEl = document.getElementById("drop");
        let fileEl = document.getElementById("file");
        let selectEl = document.getElementById("select");
        let buttonEl = document.getElementById("button");
        let labelEl = document.getElementById("label");
        let statusEl = document.getElementById("status");
        let transferEl = document.getElementById("transfer");
        let barEl = document.getElementById("bar");

        let buffer = null;

        const setStatus = state => {
            labelEl.textContent = state;
        }

        const setTransfer = progress => {
            if (!progress) {
                statusEl.style.visibility = "hidden";
                return;
            }
            selectEl.style.visibility = "hidden";
            statusEl.style.visibility = "visible";
            barEl.style.width = `${progress * 100}%`;
            transferEl.textContent = `${Math.ceil(progress * 100)}%`;
        }

        // Load a firmware image
        const setImage = (file) => {
            if (!file) return;

            const reader = new FileReader();
            reader.onloadend = evt => {
                buffer = evt.target.result;
                setStatus(`Firmware image: ${file.name}`);
                selectEl.style.visibility = "visible";
            }
            reader.readAsArrayBuffer(file);
        }

        // Choose a device
        const selectDevice = async () => {
            setStatus("Selecting device...");
            setTransfer();

            try {
                const device = await navigator.usb.requestDevice({
                    filters: [{vendorId: 0xD28}]
                });
                await update(device);
            } catch (error) {
                statusEl.style.visibility = "hidden";
                setStatus(error);
            }
        }

        // Update a device with the firmware image
        const update = async device => {
            if (!buffer) return;

            const transport = new DAPjs.WebUSB(device);
            const target = new DAPjs.DAPLink(transport);

            target.on(DAPjs.DAPLink.EVENT_PROGRESS, progress => {
                setTransfer(progress);
            });

            try {
                // Push binary to board
                setStatus(`Flashing binary file ${buffer.byteLength} words long...`);
                await target.connect();
                await target.flash(buffer);

                setStatus("Disconnecting...");
                await target.disconnect();

                setStatus("Flash complete!");
                setTransfer();
                fileEl.value = "";
            } catch (error) {
                statusEl.style.visibility = "hidden";
                setStatus(error);
            }
        }

        fileEl.addEventListener("change", event => {
            setImage(event.target.files[0]);
        });

        dropEl.addEventListener("drop", event => {
            setImage(event.dataTransfer.files[0]);
        });

        buttonEl.addEventListener("click", selectDevice);

        ["drag", "dragstart", "dragend", "dragover", "dragenter", "dragleave", "drop"].forEach(eventName => {
            dropEl.addEventListener(eventName, event => {
                event.preventDefault();
                event.stopPropagation();
            });
        });

        ["dragover", "dragenter"].forEach(eventName => {
            dropEl.addEventListener(eventName, event => {
                dropEl.classList.add("hover");
            });
        });

        ["dragleave", "dragend", "drop"].forEach(eventName => {
            dropEl.addEventListener(eventName, event => {
                dropEl.classList.remove("hover");
            });
        });
    </script>
</body>
</html>
